Brest - Grey seals from Brittany are in the habit of swimming as far as the North Sea to visit other colonies and can cross the Channel to Britain in 48 hours to cavort with other seals.
A study released this month of satellite-tagged seals by French marine biologists at the Oceanopolis research centre has shown the species to be dogged travellers, said Mr Sami Hassani, who heads studies on sea mammals at the centre.